Tipping Pizza Delivery in Minneapolis

I've been following PizzaPizza on Twitter for awhile. He's an anonymous Twitter user from an unnamed pizza delivery place in or near Minneapolis (and does not deliver to Longfellow, I know that much). It's his second job and will post about his experiences from his mobile phone while he's out delivering pizzas. Last night he got stiffed, got a $5 tip from a house with a tree fallen on it and sadly for us, he put in his two weeks notice. For our entertainment and insight into this world I hope he picks up at another pizza joint. If anything, his thoughts on what he thinks is a good tip and a shitty tip (and his reaction to it) are pretty valuable. Overnight, City Pages' Pizza Man posted a long tirade on bad tippers but at the end finally gave us the goods we're looking for: a seemingly fairly accurate tipping guide for pizza delivery with actual dollar signs and figures. Check it out. UPDATE: I've been asked, so I asked: PizzaPizza on Twitter says he's not the same as CP's Pizza Man.